Fig. 1
Footprint of the SPIRE FTS detectors (corresponding to the observation obsid: 1342214843) over the SPIRE 250 μm image. Black circles show the layout of the SLW detectors and blue circles show the position of the SSW detectors. Sgr B2(N) is observed with the central detectors SLWC3-SSWD4, while Sgr B2(M) falls onto the detectors SLWC5 and SSWB3. The blue crosses are the two dead detectors in the SSW array (SSWD5 and SSWF4). The white circle represents the FoV with a diameter ~2 arcmin (~5 pc).
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